A study of neutral particle decay in magnetic field with the "Worldline Instanton" approach
arXiv:1407.6527 · doi:10.1134/S0021364015100112
Abstract
We study the process of neutrino decay to electron and -boson in the external magnetic field using the semiclassical "worldline instanton" approach. Being interested only in the leading exponential factor, we make calculations in a toy model, treating all particles as scalars. This calculation determines the effective threshold energy of the reaction as a function of the magnetic field. Possible astrophysical applications are discussed. It is emphasized that the method is general and is applicable to a decay of an arbitrary neutral particle into charged ones in the external electromagnetic field.
13 pages, 2 figures
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